Type-arm for type-writers.



(No Model.)

' Patented June 26, I900. 6.6. KVARNSTRDM.

TYPE ARM FOB TYPE WRITERS.

(Application filed Feb. 25, 1898. Renewed Oct. 7, 1899.)

Ni dramas arnnrr @rrrcnt CHARLES G. KVARNSTROM, OF CHICAGO, ILLINOIES,

TYPE-=ARM FOR TYP'E WRITERS,

SPECIFICATION forming part of Letters Patent No, 652,679, dated June 26,1900.

Application filed February 25,1898. Renewed October '7, 1899. Serial No.732,964. (No model.)

To aZZ whom it may concern.-

Be it known that I, CHARLES G. KVARN- STROM, a citizen of the UnitedStates of Am erica, and a resident of Chicago, county of Cook, and Stateof Illinois, have invented certain new and useful Improvements inTypc-Arms for Type-Writers, of which the following is a specificationand which are fully illustrated in the accompanying drawings, forming apart of the same. 7

The invention relates to that class of typearms in which the typecharacters are carried by an oscillating block at the end of the arm, sothat it may be turned to bring the character into position for printing,and upon the return stroke of the arm, so as to bring it into contactwith an inking-pad.

The objects of the invention are to secure positive action of the typecharacter and to simplify the construction, and these objects areattained in the manner fully pointed out and as illustrated in theaccompanying drawings, in which Figure 1 is a sectional detail of atypewriter through its type-basket, showinga side elevation and theaction of my improved typearm. Fig. 2 is a bottom plan view of thetypearm and the hanger for carrying the same. Fig. 3 is a sectional viewon the line 3 3 of Fig. 2 inverted, and Fig. 4 is a perspective of thetype-block.

I use a rigid type-arm A, consisting of a pair of bars pivoted to ahanger B and oscillated by means of a link-rod O, pivotally attached toa short arm a, extending backwardly from the pivot-point and connectedwith a key-lever D. The pivot-pin E, which carries the arm A, is fixedin the hanger B and has its ends tapered, as shown in Fig. 2, for thereception of the two members of the type-arm A, which are drawn up ontothe pivot-pin by means of a bolt 6. The outer ends of the two members ofthe arm A are united by a rivet e and are turned upwardly, and thetype-block F is pivoted between them at f, the pivot-pin passing througha lateral lug of the block F, so that it is out of alinement with thelongitudinal axis of the latter. A link-bar G is pivotally attached at fto another lug projecting laterally, like f, but from the opposite sideof the type-block F and leads to and is pivotally connected at g withthe outer end of a leverarm H, shorter than the type-arm and whichswings upon the pivot-pin E, being mounted thereupon between the twomembers of the arm A. The combined length of the lever arm H and thelink G is greater than the length of the arm A, so that when they arebrought into alinement, which position they assume when the type-armfalls, the type-block F is overturned and the type character X mountedthereupon comes into contact with the inking-pad K, located near thebottom of the type-basket. When the joint 9 is flexed, as shown in Figs.1 and 3, (the position assumed when the type-arm is elevated,) thetype-block F is turned upwardly, so that the type character X is inposition for printing. When the type-block is brought to this printingposition, its body portion is supported directly by'the members of thearm A, the block being provided with lateral lugs L for contacttherewith.

The turning of the type block is accomplished by means of a stop M,fixed in the hanger l3, and a pair of baclnvardly-projecting lugs h h,carried by the lever H and so disposed that they contact, respectively,with the stop M-during the latter portion of the up-and-down strokes ofthe type-arm. By this mechanism it will be seen that as the type-arm israised by the depression of the key-lever the lug it comes into contactwith the stop M in time to bring the type character to the printingposition before the end of the upstroke of the type-bar, and upon thedownstroke the contact of the lug h with the stop M causes the overturnof the type-block, so that the type character strikes squarely againstthe face of the pad K. The stop M is slightly yielding, so as to admitof the completion of the stroke of the type-arm after the contact of thelug of thelever H with it and the consequent turning of the type-block.To secure this characteristic, the stop may be of any desired materialor form. A simple and cheap form of construction is shown in thedrawings, the stop consisting of a rubber tube set through an aperturein the hanger B, and when the pivotal points of the several type-arms ofthe machine are in alinement a continuous tube may be used extendingthrough a plurality of the hangersa construction suggested by Fig. 2 ofthe drawings. The action of the type-turning mechanism is so easy that avery soft rubber tube may be used for the stop M, permitting the typecharacter to rest squarely upon the pad K between strokes. The extremeouter end of the lever- I arm H is provided with a stop-lug g, which isso placed as to come into contact with the link-bar G as the two membersare brought into alinement and prevent the pivot g from passing thecenter, so as to' form a look.

I claim as my invention 1. In a type-arm, the combination with anoscillating arm, and a type-block pivoted to the arm; of an oscillatinglever fulcrumed at the center of oscillation of the arm, stops forlimiting the movement of the lever to a smaller angle than that throughwhich the arm swings; and a rigid link connecting the outer end of thelever with the type-block.

2. In a type-arm, the combination with a rigid oscillating arm, and atype-block pivoted at the end thereof; of a jointed. lever of greaterlength than the rigid arm and oscillating upon the same centertherewith, and being pivotally attached to the type-block; and means forstraightening the jointed member when moving in one direction, and meansfor flexing such member when moving in the opposite direction.

3. In a type-arm, the combination with a rigid oscillating arm, and atype-block pivoted at the end thereof; of a jointed member of greaterlength than the rigid arm and oscillating about the same center, andbeing pivotally connected with the type-block and means forstraightening the flexible member when moving in one direction, andmeans for flexing such member when moving inthe op- 40 posite direction.

4. In a type-arm, the combination with an oscillating arm, and atype-block pivotally attached to the end of the arm; of a lever, H,pivoted upon the same center with the arm and havingbackWardly-projecting divergent lugs, a stop for engaging such lugs tolimit the movement of the lever to a less angle than the movement of thearm; and a rigid link connecting the lever with the type-block.

5. In a type-arm, the combination with a rigid oscillating arm, and atype-block pivotally attached thereto; of an arm for turn ing thetype-block as the rigid arm oscillates; and yielding stops forinterrupting the turning arm before the rigid arm reaches the limit ofits movement.

6. In a type-arm, the combination with a rigid oscillating arm, and atype-block pivotally attached thereto; of a lever, I-I, oscillating uponthe same center with the rigid arm, and having backWardly-projectingdivergent lugs, a yielding stop for intercepting the lugs whereby theangular movement of the lever is less than that of the arm, and a linkconnectingrthe lever with the type-block.

7. In a type-arm, the combination with a rigid arm, of a type-blockpivoted near one of its ends to the arm so as to turn in the plane ofoscillation thereof, and means for turning the block back against theadvancing face of the arm during its forward stroke, whereby the blockis provided with a positive seat when in the printing position.

' CHARLES G. KVARNSTROM.

WVitnesses:

LoUIs K. GILLsoN, HESTER B. BAIRD.

